WeekdaysFunctions

Question

I am a programming enthusiast currently studying for App Development. We have started programming with Java for one months..Can someone help me fix this code?

Requirements
• The user enters the date in the YYYYMMDD format
• Any impossible date is rejected:
– dates before Oct. 15th 1582 or after Dec, 31st, 2199
– impossible month (<1 or >12)
– impossible days (e.g. any day>31, a day>30 for some months, a day>28 in February of
a non-leap year, etc)

Code: https://code.sololearn.com/cib6hTe86w64/#java

Answer 1

One question from my side: Are you supposed to program everything from scratch or are Java utilities like DateTimeFormatter or the DateTime api allowed?

Answer 2

1st advice: Take the date input as a string.
With formatter and api:
Date date=new SimpleDateFormat("yyyyMMdd").parse(input);

Without formatter and api you can use String's substring method to parse an input string, for the year it would be:
input.substring(0,4);
Then for month:
input.substring(4,6);
And so on.

Answer 3

You should use regular expressions

Answer 4

import java.util.Scanner;
...
Scanner sc = new Scanner(System.in);
int date = sc.nextInt();
-
you have two isLeap() method at line 24 and 56
-
package is not supported by Sololearn
//package WeekdaysFunctions;

Answer 5

update: https://code.sololearn.com/cib6hTe86w64/#java

I need to complete the tests in IntelliJ-Project.

Date (yyyymmdd)
19991232 - correct
21010101 - correct
20030229 - correct
19800201 - correct
19190303 - correct
15821015 - correct
15821016 - test failed
21001231 - test failed
19291025 (black Friday) - test failed

Answer 6

how are you

Answer 7

Your program works. What's your problem?
correction: it works with my Birthday 😁

Answer 8

15821016 returns Saturday, but it is Tuesday
https://www.timeanddate.com/date/weekday.html?year=1582&month=10&day=16

Answer 9

have a nice day